Based on the centos 6.5 dist,
Has sshd installed.
Has vagrant as a user installed (password vagrant)
Should be ready for running ansible against it.
Note you need to suppy the private key which is not part of this distro, you can use the vagrant user. When you run vagrant with the docker provisionor and the password in the vagrant file (config.ssh.password = "vagrant") vagrant will install its current public key in your box.